diff --git a/routers/web/repo/issue.go b/routers/web/repo/issue.go
index 952135eaf590..d0c3d3325a83 100644
--- a/routers/web/repo/issue.go
+++ b/routers/web/repo/issue.go
@@ -2557,7 +2557,7 @@ func updateAttachments(item interface{}, files []string) error {
 	case *models.Comment:
 		attachments = content.Attachments
 	default:
-		return fmt.Errorf("Unknown Type: %T", content)
+		return fmt.Errorf("unknown Type: %T", content)
 	}
 	for i := 0; i < len(attachments); i++ {
 		if util.IsStringInSlice(attachments[i].UUID, files) {
@@ -2575,7 +2575,7 @@ func updateAttachments(item interface{}, files []string) error {
 		case *models.Comment:
 			err = content.UpdateAttachments(files)
 		default:
-			return fmt.Errorf("Unknown Type: %T", content)
+			return fmt.Errorf("unknown Type: %T", content)
 		}
 		if err != nil {
 			return err
@@ -2587,7 +2587,7 @@ func updateAttachments(item interface{}, files []string) error {
 	case *models.Comment:
 		content.Attachments, err = repo_model.GetAttachmentsByCommentID(content.ID)
 	default:
-		return fmt.Errorf("Unknown Type: %T", content)
+		return fmt.Errorf("unknown Type: %T", content)
 	}
 	return err
 }
diff --git a/routers/web/repo/lfs.go b/routers/web/repo/lfs.go
index 2cb4330c082b..d2d62786fe7b 100644
--- a/routers/web/repo/lfs.go
+++ b/routers/web/repo/lfs.go
@@ -120,14 +120,14 @@ func LFSLocks(ctx *context.Context) {
 		Shared: true,
 	}); err != nil {
 		log.Error("Failed to clone repository: %s (%v)", ctx.Repo.Repository.FullName(), err)
-		ctx.ServerError("LFSLocks", fmt.Errorf("Failed to clone repository: %s (%v)", ctx.Repo.Repository.FullName(), err))
+		ctx.ServerError("LFSLocks", fmt.Errorf("failed to clone repository: %s (%v)", ctx.Repo.Repository.FullName(), err))
 		return
 	}
 
 	gitRepo, err := git.OpenRepositoryCtx(ctx, tmpBasePath)
 	if err != nil {
 		log.Error("Unable to open temporary repository: %s (%v)", tmpBasePath, err)
-		ctx.ServerError("LFSLocks", fmt.Errorf("Failed to open new temporary repository in: %s %v", tmpBasePath, err))
+		ctx.ServerError("LFSLocks", fmt.Errorf("failed to open new temporary repository in: %s %v", tmpBasePath, err))
 		return
 	}
 	defer gitRepo.Close()
@@ -140,7 +140,7 @@ func LFSLocks(ctx *context.Context) {
 
 	if err := gitRepo.ReadTreeToIndex(ctx.Repo.Repository.DefaultBranch); err != nil {
 		log.Error("Unable to read the default branch to the index: %s (%v)", ctx.Repo.Repository.DefaultBranch, err)
-		ctx.ServerError("LFSLocks", fmt.Errorf("Unable to read the default branch to the index: %s (%v)", ctx.Repo.Repository.DefaultBranch, err))
+		ctx.ServerError("LFSLocks", fmt.Errorf("unable to read the default branch to the index: %s (%v)", ctx.Repo.Repository.DefaultBranch, err))
 		return
 	}
 
@@ -525,14 +525,14 @@ func LFSAutoAssociate(ctx *context.Context) {
 	for i, oid := range oids {
 		idx := strings.IndexRune(oid, ' ')
 		if idx < 0 || idx+1 > len(oid) {
-			ctx.ServerError("LFSAutoAssociate", fmt.Errorf("Illegal oid input: %s", oid))
+			ctx.ServerError("LFSAutoAssociate", fmt.Errorf("illegal oid input: %s", oid))
 			return
 		}
 		var err error
 		metas[i] = &models.LFSMetaObject{}
 		metas[i].Size, err = strconv.ParseInt(oid[idx+1:], 10, 64)
 		if err != nil {
-			ctx.ServerError("LFSAutoAssociate", fmt.Errorf("Illegal oid input: %s %v", oid, err))
+			ctx.ServerError("LFSAutoAssociate", fmt.Errorf("illegal oid input: %s %v", oid, err))
 			return
 		}
 		metas[i].Oid = oid[:idx]
diff --git a/routers/web/repo/webhook.go b/routers/web/repo/webhook.go
index fb984de7f585..76ebd1c485d6 100644
--- a/routers/web/repo/webhook.go
+++ b/routers/web/repo/webhook.go
@@ -106,7 +106,7 @@ func getOrgRepoCtx(ctx *context.Context) (*orgRepoCtx, error) {
 		}, nil
 	}
 
-	return nil, errors.New("Unable to set OrgRepo context")
+	return nil, errors.New("unable to set OrgRepo context")
 }
 
 func checkHookType(ctx *context.Context) string {